Great game.
I had just one problem. some combinations just didnt work. this made the game extremely fustrating, so I didnt even bother playing past level 2. upleftdiagonal didnt work at all for me, and neither did the left+right combination. this wasnt just my timing, I mean it didnt work, i'd hold up+left, purple would light up, but A just didnt do anything. same for left+right. This ruined the whole game for me, but I imagine its something to do with my computer and not the game. Possibly it's because I use firefox. I really wish i didnt have this problem as the game looked really enjoyable.